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EWG's Tap Water Database — 2021 UPDATE

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Alachlor (Lasso)

Missouri American St. Louis County & St. Charles County

Alachlor is a widely used agricultural herbicide. It causes cancer in laboratory animals and may be carcinogenic to people.

MORE ABOUT THIS CONTAMINANT

 

115

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND200ND
2015ND200ND
2016ND150ND
2017ND200ND
2018ND200ND
2019ND200ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 2 ppb

The legal limit for alachlor, established in 1991, was based on toxicity studies in laboratory animals conducted in the 1980s.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-1524591301ND
2014-01-1524591701ND
2014-01-1524592401ND
2014-01-1524592901ND
2014-01-1524593101ND
2014-04-1525143101ND
2014-04-1525144001ND
2014-04-1525144301ND
2014-04-1625141301ND
2014-04-1625142201ND
2014-07-2226142901ND
2014-07-2226143601ND
2014-07-2226144401ND
2014-07-2226145201ND
2014-07-2226145501ND
2014-10-0827161801ND
2014-10-0927162101ND
2014-10-0927159601ND
2014-10-0927160101ND
2014-10-0927160901ND
2015-01-0627909801ND
2015-01-0627909601ND
2015-01-0727908401ND
2015-01-0727908001ND
2015-01-0727909101ND
2015-04-2228624601ND
2015-04-2228627301ND
2015-04-2228627601ND
2015-04-2228625501ND
2015-04-2228626401ND
2015-07-1329463501ND
2015-07-1329464401ND
2015-07-1329464701ND
2015-07-1629461801ND
2015-07-1629462601ND
2015-10-2630316401ND
2015-10-2630317701ND
2015-10-2730314901ND
2015-10-2730315501ND
2015-10-2930782501ND
2016-01-0530936501ND
2016-01-0530937101ND
2016-01-0530937301ND
2016-01-1130935201ND
2016-01-1130935701ND
2016-04-0531777201ND
2016-04-0531776201ND
2016-04-2031778201ND
2016-04-2031779201ND
2016-04-2031779501ND
2016-10-2833955101ND
2016-10-2833955301ND
2016-10-2833948101ND
2016-10-2833955001ND
2016-10-3133955201ND
2017-01-1034321501ND
2017-01-1134320201ND
2017-01-1134320701ND
2017-01-2034322101ND
2017-01-2034322301ND
2017-04-1135121901ND
2017-04-1135122801ND
2017-04-1135123101ND
2017-04-1935120901ND
2017-04-1935119901ND
2017-07-0436143701ND
2017-07-0436144601ND
2017-07-0436144901ND
2017-07-1436142201ND
2017-07-1436142901ND
2017-10-1637229401ND
2017-10-1737228101ND
2017-10-1737228601ND
2017-10-2437230301ND
2017-10-2437230601ND
2018-01-0938145501ND
2018-01-1838146001ND
2018-01-1838146201ND
2018-01-1938144401ND
2018-01-1938144801ND
2018-04-0639051701ND
2018-04-0639052601ND
2018-04-1639053501ND
2018-04-1639054301ND
2018-04-1639054601ND
2018-07-2340296901ND
2018-07-2340297201ND
2018-07-2440294501ND
2018-07-2440295201ND
2018-07-2640296001ND
2018-10-0941291001ND
2018-10-0941291501ND
2018-10-0941292301ND
2018-10-0941293201ND
2018-10-0941293501ND
2019-01-0942526401ND
2019-01-0942526801ND
2019-01-0942527501ND
2019-01-0942528001ND
2019-01-0942528201ND
2019-04-0843598201ND
2019-04-0843599201ND
2019-04-0943600101ND
2019-04-0943601101ND
2019-04-0943601201ND
2019-07-1045230701ND
2019-07-1045231701ND
2019-07-1045232701ND
2019-07-1045233901ND
2019-07-1045234001ND
2019-10-0746956801ND
2019-10-0746957401ND
2019-10-0746958201ND
2019-10-0746959101ND
2019-10-0746959301ND